BEUTENMULLER, MONOGRAPH OF THE SESIID^E. 249 



Said to be very destructive in California and Nevada to the white polpar 

 {Populus alb.i) and to the downy poplar {Populus canescens), both of these trees 

 being introduced into the Pacific States as ornamental trees. It also destroys 

 the locust {Robinia pseudacacici). 



In Nevada the moth appears in July and on the Pacific coast during March 

 and April. 



Memythrus cupressi {Hy. Edw.). 



Plate XXX, Fig. 2, Male. 



Sciapteron cupressi Hy. Edwards, Papilio, Vol. I, 1881, p. 183 ; Grote, New Check List N. Am. 

 Moths, 1882, p. 11 ; Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VIII, 1896, p. 121. 



Male. — Vertex of head, palpi, and antennae rich orange ; face light orange. Collar purplish 

 brown, edged in front with rich orange brown and on each side behind with golden yellow. Thorax 

 rich brown with the patagia orange brown, edged within with golden yellow ; on the thorax behind 

 is a golden yellow transverse mark and a tuft of the same color mixed with orange on each side 

 posteriorly. Abdomen with basal segment black, the second deep orange, edged posteriorly with 

 yellow, the third yellow edged with orange behind ; the remaining segments deep yellow as are also 

 the four anal pencils. Legs orange, femora washed with black, hind tibiae yellow and orange ; tarsi 

 orange. Fore wings purplish brown, yellow at the base and an orange streak along the middle to 

 the indistinct discal mark ; underside washed with golden yellow, darker outwardly. Hind wings 

 transparent, veins purplish brown, margin and fringe violet brown, with an orange line along the inner 

 margin to the angle. Underside orange along the costa, and the orange along the inner margin 

 more prominent than above 



Female. — Similar to the male, but lacks the four pencils at the end of the abdomen. The 

 fore wings are somewhat paler, and the second to fifth segments inclusive are broadly orange 

 anteriorly, yellow behind, remaining segments yellow. Underside of thorax orange and yellow. 

 Collar orange, broadly yellow behind. Palpi bright yellow, orange at the base. Legs orange and 

 yellow. 



Expanse : Male and female, 30-35 mm. 



Habitat. — Utah, Colorado, Arizona. 



Type : One female. Coll. B. Neumoegen, Brooklyn Inst. Arts and Sci. 



Closely allied to M. robinicz, but the male has four anal pencils which are 

 absent in robinicz. The abdomen has the first segment black, the second deep 

 orange, and the remaining ones yellow. Robinice has the first three segments 

 black. The early stages are not known. 



Memythrus polistiformis {Harris). 



Plate XXX, Figs. 7 Male and 8 Female. 



JEgeria polistiformis Harris, Am. Pomol. Soc. 1854, p. ro ; Glover, Rep. U. S. Com. Pat. T854 

 (1855), p. 80, pi. vi, figs.; Rep. U.S. Com. Agricul. .867 (1868), p. 72, figs.; ibid. 1873 (1874), 

 p. 159 ; Month. Rep. Dept. Agricul. 1873, p. 496 ; Walsh, 1st Rep. Nox. Ins. 111. 1868, p. 24 ; 

 Packard, Guide Study Ins. 1869, p. 278 and other editions; Riley, 3rd Rep. Nox. Ins. 

 Mo. 1871, p. 75, figs.; Bethune, Can. Ent. Vol. V, 1873, p. 218 ; Thomas, 2nd Rep. Nox. 

 Ins. 111. 1877 (1878), p. 171 ; Perkins, 5th Rep. Vermont Bd. Agricul. 1878, p. 263 ; Mar- 

 tin, 5th Rep. Nox. Ins. 111. 1880 (1881), p. 108; Stout, Rep. Kansas Hort. Soc. 1879 

 (1880), p. 88 ; Saunders, Ins. Inj. Fruit, 1883, p. 229 ; ibid. 1889, P- 22 9- 



